Whta is the significance of ~/.cache/guix/profiles?

[Unstable Horse]

Good day, people.

I'm trying to GC my system for the first time, and after running this
command:

    guix gc --list-roots | sort -u

Among the expected roots such as guix-profile-*-link and 
current-guix-*-link I also see dozens of lines like this one:

/home/user/.cache/guix/profiles/wjel4twocqclznutccv2mx65a5rxpb6e7lluegd
zsksvdy3lp74a

with just the hash and no name. What are they for? Is it safe to just

    rm -rf ~/.cache/guix/profiles

once in a while, or should I leave them be?